Which of these actions are examples of improving sustainability? Select three options.
 Responses
 a) Instead of growing corn in every field each year, a farmer rotates in cover crops.
 b) A company uses plastic packaging because it deters theft.
 c) A farmer decides to grow almonds, which need a lot of water.
 d) A worker replaces her sedan with an SUV so she can use it for camping trips as well as commuting.
 e) A company switches from plastic to cardboard packaging.
 f) A worker arranges to work from home twice a week, avoiding the commute.